the fbi is investigating e-mail sent between kelley and the top u.s. commander in afghanistan general john allen. 20 to 30,000 pages of e-mails over the last two years described as potentially inappropriate. adultery is a crime in the military. general petraeus says his affair with broadwell did not start until after he left afghanistan. broadwell's co-author on the petraeus biography said he never suspect add affair but was curious about something else. >> what was a question in my mind was why general petraeus was granting paula broadwell the kind of access he granted her. >> reporter: last night fbi agents searched broadwell's home in north carolina. they won't say what they found. retired army colonel tells "the new york times" ' wife of 38 years, holly, is not exactly pleased right now, a quote. also furious would be an understatement. the fbi agent in florida who jill kelley went to with the so-called threatening e-mails from petraeus' mistress has been taken off the case accused of sending revealing pictures of himself to kelley. allen will keep